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My Evo X had been in need of a new OEM clutch, but on the internet I could not find a list of parts needed. Eventually, I ended up ordering a bunch of items, and luckily my shop was able to install the new clutch smoothly. Therefore, allow me to share this information here.
By the way, my Evo X's drivetrain is mostly stock (other than an HKS cat-back), and the current dealer-installed clutch has 81k miles. Due to the aging clutch, the clutch pedal has become heavy and noisy. In hindsight, I should have replaced the clutch earlier, such as when the clutch had ~60k miles. Anyway, I am pleased that the clutch pedal now feels light and is also quiet. The pedal feel has not changed after a week as I'm breaking in the new clutch (i.e. no launch and no excessive heat for the first 500 miles).
§Essential parts:
1. The complete clutch kit (e.g. MBK1009)
I bought the Exedy OEM clutch kit (p/n: MBK1009) because: One, it is appropriate for my Evo X's stock-level torque, and; Two, my fellow Evo X owners MGOD92 and Rohan both didn't have a good experience with their ACT clutches:
Originally Posted by MGOD92
Installed a Act clutch along with the mono lock and the car won’t go into gear and adjusted the pedal and bleed it a lot and when trying to go in reverse it grinds. Any ideas
Originally Posted by Rohan-y8v8u
Its been a long time, but how did you solve this? Im having the same problem
Originally Posted by MGOD92
went with excedy instead of junk ACT clutch
our pressure plate was twisted
If your Evo X has more power, then choose a clutch kit appropriate for that power.
The Exedy OEM clutch kit includes:
1a) A pressure plate
1b) A clutch friction disc
1c) A clutch alignment tool - This specialty tool is essential for aligning the plate and disc properly. If your clutch kit does not include this, ACT makes one (p/n: AT03).
1d) A clutch release/throw out bearing - This is essential and is included. Nevertheless, if your clutch kit doesn't, you can buy an OEM one (p/n: 2317A001) or an Exedy one (p/n: MBAK101).
1e) high-melting-point spline grease - My Exedy clutch kit includes a sachet of this grease as courtesy. If your clutch kit does not have this included, the Honda OEM Super Hi-Temp Urea Grease (Honda p/n: 08798-9002) is perhaps a suitable alternative. See Exedy's Technical Note 051 under the appendices below, for how not to apply this excessively.
You can either buy seven (7×) Mitsubishi OEM 1120A062 bolts, or one (1×) set of ARP 207-2801 bolts.
The OEM flywheel bolts are single-use, torque-to-yield bolts. They must be replaced (and not reused) every time when the flywheel is reinstalled.
I chose the OEM bolts because my shop (experienced at repairing Subaru WRX's) prefers OEM. However, if you choose to use the ARP bolts, make sure that you have a 3/4-inch(?) 12-point (i.e. double hex) socket needed to torque the ARP bolts.
3. ACT Monoloc collar (p/n: 884007P)
The Evo X pressure plate typically comes with a 2-piece collar, which could sometimes disintegrate and cause the clutch to fail. The one-piece ACT Monoloc collar prevents this (ACT-branded clutches usually include a Monoloc, and you don't need to buy separately):
Originally Posted by AWD96
We have a local guy who is on an Exedy Triple, he literally popped his clip 3 times in a row like it was nothing. He got the Mono-Loc when it was first released from STM, and has not had one issue since. I know that during install, if you don't get the trans into the clutch just right, you can damage the fingers on the clip, I think thats where alot of peoples issues are coming from
According to STM:
Evo 9, 8, 7, and 2004-2021 Subaru STi with a pull-type clutch (i.e. crimped retainer) should use ACT Monoloc collar 884006P.
Evo X with an OEM or OEM-like push-type clutch (i.e. snap ring type retainer) should use ACT Monoloc collar 884007P.
According to ACT:
Originally Posted by AdvancedClutchTechnology
The 884006P is designed for use with pressure plates that use the wedge collar held in by a crimped retainer for pull-type applications such as Mazda RX-7, Mitsubishi EVI VIII / IX, Subaru WRX and Sti.
The 884007P is for use with the original style Mitsubishi EVO X pressure plate that uses a wedge collar retained by a snap ring. [...]
Originally Posted by ACTman
[...] The snap ring portion of the collar (both stock and Monoloc) is the only part that determines the location of the bearing into the lever plate (center of the pressure plate).
If the collar was too tall or short it simply wouldn't snap in place. If it snaps in place, then is will work. [...]
While ACT clutch kits usually included a Monoloc collar (proper for the pressure plate type) as courtesy, my Exedy OEM clutch kit (p/n: MBK1009) comes only with a 2-piece collar (which is usable, but the installer must be careful not to damage the fingers of the 2-piece collar). Because the Exedy kit's pressure plate is the OEM push-type, I also purchased a 884007P like Xtra_Slo (the YouTuber) and Brandon Foust (an MAP customer) did.
Although the Exedy kit's pressure plate features a no-corners-cut metal ring (almost looks like those pull-type clutches'), I asked my shop to install the 884007P regardless. Afterwards, I have been driving my Evo X with MBK1009 and the 884007P for a week. Thank the Machine God, there has been no problems. I am not sure if a 884006P could even fit the Exedy MBK1009 kit.
^ Page 8 and 9 of ACT Monoloc's installation instruction.
To avoid confusion, you can have the ACT Monoloc collar, appropriate for your pressure plate, installed before giving it to your shop. Also, ACT recommends using both the wave springs included in the 884007P. The wave springs might help with uniform loading and smoother initial engagement:
Originally Posted by ACTman
It comes with two wave springs, but since the snap ring is no longer able to dislodge from the collar, we don't believe more are needed.
Originally Posted by 5LEEPERISAH23I
installed mine today. was perfect.. To lock it in, you have to really snap it hard. Harder then the stock one. Give it a good push and it should lock in
As the best practice, these two seals should be replaced every time. They prevent engine bay oil and grease from leaking into the clutch.
^ MD749474 (part #20446 in the diagram).
5. One bottle of Mitsubishi OEM SAE-90 differential gear oil (p/n: MZ320345)
During the clutch replacement, Evo X's transfer case unit has to be removed, and this gear oil will come out. This necessitates refilling the gear oil into the front differential. Xtra_Slo explained how to fill this gear oil through the drain hole, which is roughly the final 1/3 of this video:
6 (optional). Three (3×) bottles of Red Line MT-85 manual transmission fluid
Ordinarily, as recommended, the manual transmission fluid should also be replaced in this service. Use the proper fluid. My transmission is stock, so I bought three bottles of Red Line MT-85.
The 24(?)-mm drain bolt also needs a new crush washer. My shop has plenty of them in stock, so I didn't supply.
A Mitsubishi OEM clutch slave cylinder often lasts 50k~100k miles, depending on vehicle usage and pressure plate weight. If your clutch slave cylinder is old, replace it with a new OEM one during this service.
Unlike the OEM clutch master cylinder which is plastic, the OEM slave cylinder is metal and plenty durable. I do not believe that you need a stronger aftermarket replacement.
A Mitsubishi OEM clutch release fork often lasts 50k~100k miles, depending on corrosion and the wear of fork pivot points. Snowy climate and salty winter roads might hasten the corrosion. A heavier aftermarket pressure plate hastens the wear. If your clutch release fork is old, replace it with a new OEM one during this service.
While these OEM M8x16 bolts are not "torque-to-yield," they need to be in good condition for reuse. If they are too rusted or cannot be effortlessly threaded by hand, you should replace them with new ones.
ARP also makes M8x16 bolts. The chrome moly version (p/n: 661-1017) with black oxide coating does not gall but can rust. The stainless steel version (p/n: 761-1017) does not rust but can gall (a.k.a. cold weld). If you order 2 packages of one part number, you would have more than 6 replacement bolts. I did not try these ARP bolts (although in hindsight I should), so I couldn't comment on their reusability or their washers' fitment.
It is possible to machine and resurface the existing flywheel for reuse, which saves some cost. However, if your flywheel has already be resurfaced 2~3 times or if its wear-indicator groove is gone, you should order a new one.
My OEM flywheel was badly worn after all the miles, but my shop professionally machined it and it can still be reused this one time. Therefore, I did not need to purchase a new one.
§Not needed: Radium, STM, or MAP clutch fork stop
While salespeople may recommend a clutch fork stop, it is not needed with an ACT Monoloc collar in place. They prevent the same problem. However, the ACT Monoloc collar is maintenance-free, while the clutch fork stop requires periodic gap adjustment:
You only need it on a multi disc clutch setup like an exedy twin or triple
It goes over the slave cylinder and prevents the throw out bearing from becoming unclipped during hard shifting
Originally Posted by Babs
This is why I completely removed mine...I had an STM one too and it just kept backing out so I just decided I didn't need to slam gears anymore for the car's sake and the clutch's.
§Above is everything for the part list.
Wheel alignment would be needed right after, if the subframe is removed during the clutch replacement.
How many labour hours are needed to perform this clutch replacement service? For an experienced Evo X mechanic, it can be as little as 8 hours with a low-mileage, rust-free Evo X. But it can also take as many as 15 hours with an older, rusty Evo X that has numerous minor problems.
At last, our fellow Evo X owner Xtra_Slo has a video guide on how to remove Evo X's transmission, in case if you ever need:
^ Service Manual Group 11A (Engine Mechanical) page 11A-53. This page specifies that ThreeBond 1324 (a medium-strength threadlocker) must be used for the new flywheel bolts.
^ Service Manual Group 22A (Manual Transaxle) page 22A-127. This page specifies that Mitsubishi genuine grease (p/n: 0101011) should be applied to the tips of the clutch release fork.
^ Service Manual Group 22B (Manual Transaxle Overhaul) page 22B-44.
^ Service Manual Group 21A (Clutch) page 21A-2.
^ Service Manual Group 21A (Clutch) page 21A-3. This page explains the proper clutch pedal setting (B value = [4mm, 9mm]. C value = [110mm, 116mm]. D value ≥ 13.5mm). Lucky for me, my clutch pedal's B, C, and D values all feel great after the new clutch is in, and thus the pedal doesn't need any adjustments.
^ Last page of the AMS clutch master cylinder installation instruction. This page explains the AMS-recommended clutch pedal travel setting for the Evo X (C value = [105mm, 110mm])
^ Clutch pedal still making noise after a new clutch? This forum post circled the joints of the clutch pedal assembly that need lithium grease sprayed for quiet operations.
^ Exedy included 3 pages of fitting instructions in the box. This is page 1.
^ Exedy included 3 pages of fitting instructions in the box. This is page 2.
^ Exedy included 3 pages of fitting instructions in the box. This is page 3.
^ Pressure plate of my Mitsubishi dealer-installed clutch, after approx 81k miles (130,254 km).
^ Pressure plate from the Exedy MBK1009 kit, brand new. I have an ACT Monoloc collar (884007P) installed, which replaces the Exedy 2-piece collar.
^ Parts that I provided to my shop, except the clutch fork stop (the green-black Radium box upper right) which turns out to cause more problems that it solves. On the left, the OEM oil filter (and a drain plug washer taped to it) is just for oil change.
Last edited by Lightsaber; Mar 12, 2026 at 02:32 PM.
Reason: Typo
Your write-ups are always filled with great information! I don't even have a 5spd Evo 10, it's the SST, and I still read this whole thing!
Thank you RobbieOh! It is my pleasure to share. Also, I took several photos of the parts and the car during the service:
^ Exedy OEM clutch kit (MBK1009). The included Exedy release/throw out bearing, spline grease, and alignment tool are very handy. The one-page Exedy Tech Note 051 is not included in this kit, so it might be a good idea that you print the page and include it in the box.
^ Exedy friction disc included in the clutch kit (MBK1009). The springs make daily driving so much easier.
^ Exedy pressure plate included in the clutch kit (MBK1009).
^ Exedy 2-piece collar with a single wave spring. I did not use this, and instead replaced the Exedy collar with an ACT Monoloc collar (884007P).
^ Underside of the Evo X, showing stock intercooler, Mishimoto radiator (MMRAD-EVO-10), hoses, and an oil filter screwed into the oil pan.
^ 5MT transmission and flywheel removed.
^ Turbo and coolant hoses going into the 4B11T engine.
I appreciate the careful and diligent work of my shop. The clutch and pedal actually feel better and smoother than when I first bought the Evo X in 2014.
Over the years, the Evo X has proven to be one of the most reliable sportscars that I can speak of. She only broke down twice on the road. Once was because a Mitsubishi dealer failed to properly apply tire bead sealer after installing new tires, and one tire lost pressure on the interstate right after. Another time was because a different Mitsubishi dealer failed to torque down the nuts of the clutch pedal and master cylinder, causing the clutch pedal to disconnect from the master cylinder on the road.
If anyone is unsure how the clutch works, Paul Cangialosi has a 16-minute lesson that explains:
Parts needed to replace the clutch of a 5MT Evo X
